261767270 has 16 divisors (see below), whose sum is σ = 474622848. Its totient is φ = 103942080.

The previous prime is 261767257. The next prime is 261767279. The reversal of 261767270 is 72767162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261767279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94166 + ... + 96905.

It is an arithmetic number, because the mean of its divisors is an integer number (29663928).

Almost surely, 2^261767270 is an apocalyptic number.

261767270 is a deficient number, since it is larger than the sum of its proper divisors (212855578).

261767270 is a wasteful number, since it uses less digits than its factorization.

261767270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191215.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 261767270 is about 16179.2234053430. The cubic root of 261767270 is about 639.6932693589.

The spelling of 261767270 in words is "two hundred sixty-one million, seven hundred sixty-seven thousand, two hundred seventy".